Basic Light / Dark Activated Switch

This circuit uses a simple LDR based circuit in super-Darlington set-up to activate the onboard relay (see Relay FAQ for details).

Best suited to applications where the change in light level is large and the transition quick e.g. to activate a music box when the lid is opened.

The Light/Dark mode switch is used to select either light or dark activation of the relay. This enables the unit to be operated in its low-current standby mode for the majority of the time according to your application.

This kit uses the LDR and Schmitt trigger circuitry to eliminate the problem of relay chatter at the trigger threshold so that the circuit can be used where the change in light with be small and gradual...

12Vdc light activated detector module with adjustable sensitivity and mains rated relay output allowing switching of loads up to 230Vac, 5A. The relay is activated when the light level falling on the detector board rises above a user set threshold. The rel...

£12.21 +VAT, £14.65 Inc

In Stock (UK Warehouse)

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